Footwear sole



FIG. 1 is a bottom perspective view of a footwear sole embodying my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

The dot-dot-dash broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for footwear sole, as shown and described. 